HUBBLE SPACE TELESCOPE

       DAILY REPORT #2543

PERIOD COVERED:  0000Z (UTC) 01/19/00 - 0000Z (UTC) 01/20/00

Daily Status Report as of 020/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Two Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to make a 
CCD bias calibration observation.  This is to monitor the darks for the 
STIS CCD.  The observations were executed as scheduled, and no anomalies 
were reported.

    1.2 Completed TSTIS/CCD 8409 (CCD Bias Monitor C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at 
gain = 4 in order to build up high-S/N superbiases and track the evolution 
of hot columns.  The observations completed with no problems.

    1.3 Completed STIS/CCD/MA2 8511 (Full-field Sensitivity and Geometry)

        The Space Telescope Imaging Telescope (CCD and MA2) was used to 
measure the geometric distortion for each STIS detector, using the same 
field as previously used for measuring the MAMA geometric distortion in 
cycle 7.  These exposures will also serve to measure the image location for 
each of the MAMA imaging modes, with respect to the CCD frame, In order to 
fix the detector coordinates for the STIS MAMA imaging modes with respect 
to the CCD coordinates, and hence to the FGS system.  The proposal 
completed nominally.

    1.4 Completed STIS/CCD 8202 (Bright Quasar Close Lensing Search)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ2316-0 as part of a second generation survey to search 
for bright lensing quasars.  With the restored PSF, new images will be 
considerably more sensitive to the presence of both close separation and 
faint lens components, and because STIS reaches two magnitudes fainter the 
PC, the new snapshot images will have much greater dynamic range.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.5 Completed STIS/CCD/MA1/MA2 8424 (MAMA Sensitivity and Focus Monitor C8)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to make observations of object J0307+105 in order to measure the 
sensitivity and to focus monitor C8.  This also is to monitor sensitivity 
of each MAMA grating mode to detect any change due to contamination or 
other causes, and to monitor the STIS focus in a spectroscopic mode.  A 
wavelength calibration was also taken.  The observations were completed as 
planned, and no anomalies were reported.

    1.6 Completed STIS/MA2 8509 (NUV MAMA Darks)

        The Space Telescope Imaging Spectrograph (MA2) was used to 
determine the health of the FUV MAMA detector by monitoring the background 
count rate.  The observations completed with no reported problems.

    1.7 Completed STIS/CCD 8474 (Coronographic Imaging of Protoplanetary Disks)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
broad-band optical coronographic imaging of HD-36112 that will be used to 
search for circumstellar disks and indirect signatures of the presence of 
massive planets toward the nearby Herbig Ae/Be and T Tauri stars.  The 
observations completed with no reported problems.

    1.8 Completed FGS 8522 (Adjusting FGS2r's AMA for Optimal 
Interferometric Performance)

        The FGS2R was used to obtain S-curves at selected locations within 
the FGS2R FOV.  These data will be will be used to adjust the AMA so as to 
align the HST pupil onto the interferometer's Koesters prisms.  The final 
AMA position will be set to produce an acceptable set of s-curves across 
the FGS2r FOV.  The proposal completed with no reported problems.

    1.9 Completed WF/PC-2 8194 (Evolution of High-Redshift Seyfert Galaxies)

        The WF/PC-2 was used to make observations of the high-redshifted 
Seyfert galaxy Gal-105016 in order to study its evolution.  The 
observations will provide insights into the Seyfert phenomenon at 
intermediate redshift and will complement similar HST studies of normal 
galaxies, clusters and quasars.  The observations were executed as 
scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 9
Successful: 9

  Scheduled Re-acquisitions: 5
Successful: 5

    2.2 FHST Updates:
Scheduled: 20
Successful: 20

    2.3 Operations Notes:

        Servicing Mission Observatory Verification (SMOV) activities 
comprise much of the operational activity.

        Using ROP SR-1, the SSR EDAC error counter was cleared once.

        SSA transmitters 1 and 2 were turned on and off once each per ROP 
IC-1.  The same activities were accomplished for MA transmitter 1 per ROP IC-2.

        The STIS MCE-1 reset at 019/142602Z while the low voltage was on 
and while in an SAA interval.  The STIS flight software error counter was 
cleared at 019/1453Z.  MAMA-1 will be recovered at 020200934Z via normal 
SMS commanding.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of SMOV and normal science observations and calibrations.

/CAW